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Parley vs Brainscape: catalog facts
Parley	Brainscape
Free Free and open source as part of the KDE applications.	Freemium Free to start, with paid upgrades for extra features.
Windows, Linux	Android, iOS, Web
Spaced repetition scheduling for reviews Several training modes, including multiple choice and written answers	Large catalog of ready-made decks Confidence-based spaced repetition
No mobile apps Desktop interface feels dated next to app-based trainers	Proprietary, cloud-based decks Some features sit behind a paid upgrade
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-2.0-or-later	License not stated
No account needed	Account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.